CN218761143U

CN218761143U - Low torsional rigidity torsion-limiting flywheel damper assembly

Info

Publication number: CN218761143U
Application number: CN202223115449.1U
Authority: CN
Inventors: 蒋江东; 黄鹏; 朱双; 孙勤超; 吴建聪
Original assignee: Chongqing Haofeng Auto Parts Co ltd
Current assignee: Chongqing Haofeng Auto Parts Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-28
Anticipated expiration: 2032-11-23

Abstract

The utility model provides a low torsional rigidity torsion-limiting flywheel damper assembly, which comprises a torsion-limiting unit and a damping unit; the torque limiting unit comprises a flexible disk, a flywheel, a first friction piece, a driven disk and a second friction piece, wherein the flexible disk and the flywheel are fixedly connected, and the first friction piece, the driven disk and the second friction piece are sequentially laminated and pressed between the flexible disk and the flywheel; the torque limiting unit further comprises an elastic piece, the elastic piece is arranged on at least one of the first friction piece and the second friction piece and is in a compressed state to press the first friction piece, the driven disc and the second friction piece tightly; the vibration reduction unit comprises a vibration reduction disc fixedly connected with the driven disc and an output disc hub arranged between the driven disc and the vibration reduction disc; the damping unit also comprises at least two damping springs, each damping spring is arranged on a spring mounting part limited by the driven disc, the disc hub and the damping disc, and the at least two damping springs are uniformly arranged along the circumferential direction of the disc hub; the damping spring is an arc spring. The low torsional rigidity torsion-limited flywheel damper assembly has the advantage of low torsional rigidity.

Description

Low torsional rigidity torsion-limiting flywheel damper assembly

Technical Field

The utility model relates to a thoughtlessly move car transmission technical field, concretely relates to low torsional rigidity limit turns round flywheel damper assembly.

Background

In a conventional fuel powered vehicle, a clutch is located between the engine and the transmission to ensure smooth vehicle launch and prevent transmission overload. Whereas in hybrid vehicles, the conventional clutch is replaced by a torque limiting damper.

The applicant's prior chinese patent CN217207427U discloses a torque-limiting flywheel damper assembly, the structure of which is shown in fig. 1 and fig. 2. The torsion limiting flywheel damper assembly is characterized in that each torsion limiting component of the traditional torsion limiting damper is arranged between the flexible disc and the flywheel in a pressing mode, the flexible disc plays a role of a gland of the traditional torsion limiting damper, the flywheel plays a role of a supporting disc of the traditional torsion limiting damper, then two parts of the gland and the supporting disc are omitted, the types of parts are reduced, and the production cost is greatly reduced.

However, in practical applications, the applicant finds that, in the torque-limiting flywheel damper assembly, since the damping springs 23 of the damping unit are of a linear structure, the free length a of a single damping spring 23 is short, which in turn causes the torsional rigidity of the damping spring 23 to be high when power is transmitted, and in turn causes the damping and noise reduction performance of the whole transmission system to be poor.

Therefore, how to solve the problem of poor vibration damping and noise reduction performance of the torque-limiting flywheel damper assembly due to the large torsional stiffness of the damping spring becomes a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a low torsional rigidity limit turns round flywheel damper assembly to solve the current limit turns round flywheel damper assembly because of damping spring torsional rigidity is big, and the relatively poor problem of damping noise reduction performance that leads to.

In order to achieve the above object, the present invention provides a low torsional rigidity torsion-limited flywheel damper assembly, which comprises a torsion-limited unit and a damping unit;

the torque limiting unit comprises a flexible disk and a flywheel which are fixedly connected, and a first friction piece, a driven disk and a second friction piece which are sequentially stacked and pressed between the flexible disk and the flywheel;

the torque limiting unit further comprises an elastic member which is arranged on at least one of the first friction member and the second friction member and is in a compressed state to press the first friction member, the driven disc and the second friction member;

the vibration reduction unit comprises a vibration reduction disc fixedly connected with the driven disc and an output disc hub arranged between the driven disc and the vibration reduction disc;

the damping unit further comprises at least two damping springs, each damping spring is mounted on a spring mounting portion defined by the driven disc, the hub and the damping disc, and the at least two damping springs are uniformly arranged in the circumferential direction of the hub;

the damping spring is an arc spring.

Preferably, the hub is provided with hollow spring windows corresponding to the damping springs one by one, and the damping springs are accommodated in the spring windows;

an annular lubricating grease cavity is defined between the driven disc and the damping disc, at least two damping springs are arranged in the lubricating grease cavity along the circumferential direction, and lubricating grease is filled in the lubricating grease cavity;

and driving parts for driving the damping springs to realize compression are arranged on the inner wall surfaces of the driven disc and the damping disc corresponding to the two ends of each damping spring.

Preferably, the driving part is a driving boss formed by simultaneously inwards recessing the driven disc and the damping disc, and each driving boss corresponds to each end of each damping spring one to one.

Preferably, a sliding sheet in an annular shape is fixedly arranged in the lubricating grease cavity, the sliding sheet is used for being provided with a sliding groove matched with the appearance of the damping spring on one side matched with the damping spring, and the damping spring is in sliding fit with the sliding groove.

Preferably, the torque limiting unit further comprises a separating ring, and the separating ring is press-fitted between the elastic member and the first friction member/the second friction member.

Preferably, the elastic member is a disc spring

The utility model discloses have following beneficial effect:

according to the technical scheme, the damping spring of the low-torsional-stiffness torque-limiting flywheel damper assembly is in the arc form, so that compared with the existing linear damping spring, a single damping spring has a longer free length a, and the longer the free length a of the damping spring is, the longer the length of the damping spring which can be compressed is, namely under the condition that the installation radius of the damping spring on the hub is not changed, the larger the rotation angle of the damping spring in the arc form is. Since the torsional rigidity = transmission torque ÷ torsional angle, the greater the torsional angle, the smaller the torsional rigidity when the same magnitude of torque is transmitted. Proved by a large number of practical vehicle tests and volume production practical results in the industry, the lower the torsional rigidity of the vibration damping unit is, the better the vibration damping and noise reduction performance of the hybrid vehicle transmission system is.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural view of a prior art torsion limited flywheel damper assembly;

FIG. 2 is a cross-sectional view of a prior art torque limiting flywheel damper assembly;

fig. 3 is a schematic structural view of the low torsional rigidity torsion-limited flywheel damper assembly of the present invention;

fig. 4 is a cross-sectional view of the low torsional stiffness torsion limited flywheel damper assembly of the present invention;

FIG. 5 is a cross-sectional view of a damping unit of the low torsional stiffness torque limited flywheel damper assembly of the present invention;

fig. 6 is a cross-sectional view of a hub of the low torsional stiffness torque-limited flywheel damper assembly of the present invention;

FIG. 7 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3;

reference numerals

10-a torque limiting unit;

11-a flexible disk; 12-a flywheel; 13-a first friction member; 14-a driven disc; 15-a second friction member; 16-an elastic member; 17-a separation ring;

20-a damping unit;

21-a vibration damping disc; 22-a hub; 22 a-spring aperture; 23-a damping spring;

30-a grease chamber;

40-a drive member;

50-sliding sheet.

Detailed Description

The core of the utility model lies in providing a low torsional rigidity limit turns round flywheel damper assembly to it is big because of damping spring torsional rigidity to solve current limit turns round flywheel damper assembly, and the relatively poor problem of performance of making an uproar falls in the damping that leads to.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 3, fig. 4, and fig. 5, the embodiment of the present invention discloses a low torsional rigidity torsion-limiting flywheel damper assembly, which includes a torsion-limiting unit 10 and a damping unit 20, wherein the torsion-limiting unit 10 plays a role in limiting torque, and the damping unit 20 plays a role in damping.

Specifically, the torque limiter unit 10 includes a flexible disk 11 and a flywheel 12, which are tightly connected, and a first friction member 13, a driven disk 14, and a second friction member 15, which are sequentially stacked and press-fitted between the flexible disk 11 and the flywheel 12. The torque limiting unit 10 further includes an elastic member 16, and the elastic member 16 is provided on at least one of the first friction member 13 and the second friction member 15 and is in a compressed state to press the first friction member 13, the driven disc 14, and the second friction member 15 in the axial direction. In some embodiments, the elastic member 16 may be a disc spring. Please refer to fig. 4 for a structure of the torque limiter unit 10.

And the damping unit 20 comprises a damping disk 21 fixedly connected with the driven disk, and an output disk hub 22 arranged between the driven disk 14 and the damping disk 21. Damping unit 20 further includes at least two damping springs 23, each damping spring 23 being mounted to a spring mounting portion defined by driven plate 14, hub 22, and damping plate 21, at least two damping springs 23 being uniformly arranged in a circumferential direction of hub 22, damping springs 23 being arc-shaped springs. Fig. 5 shows a structure of the damping unit 20.

The low torsional rigidity torsion-limiting flywheel damper assembly is usually applied to a transmission system of a hybrid electric vehicle, and in the practical application process, the flexible disk 11/the flywheel 12 are fixedly connected with a crankshaft of the vehicle. The crankshaft rotates to drive the flexible disc 11 and the flywheel 12 to rotate simultaneously, the flexible disc 11 and the flywheel 12 drive the driven disc 14 and the damping disc 21 to rotate simultaneously, the driven disc 14 and the damping disc 21 cooperate with the damping spring 23 to drive the disc hub 22 to rotate, and the internal spline hole of the disc hub 22 is connected with an input shaft of the gearbox, so that the power of the automobile crankshaft is transmitted to the gearbox.

During the above power transmission, driven disc 14 limits transmittable torque by frictional engagement of first friction member 13 and second friction member 15. Driven disk 14 slips whenever a preset torque at the friction joint is exceeded, thereby implementing a torque limiting function such that the components of the powertrain are protected from overload and damage. In the power transmission process, power is first transmitted to the driven disc 13 and the damper disc 21 through the torque limiter unit 10, and then the driven disc 13 and the damper disc 21 compress the damper spring 23, and the damper spring 23 is then transmitted to the output hub 22. In this way, the fluctuation in the power output from the powertrain is absorbed by the damper spring 23, so that the power transmitted to the transmission of the vehicle is smoothed to perform the damping function.

According to the above technical solution, since the damper spring 23 of the low torsional rigidity torsion limited flywheel damper assembly is in the form of an arc, compared with the existing linear damper spring, the single damper spring 23 has a longer free length a, and the longer the free length a of the damper spring 23 is, the longer the length that the damper spring 23 can be compressed is, that is, under the condition that the installation radius of the damper spring 23 on the hub 22 is not changed, the larger the rotation angle of the damper spring 23 in the form of an arc is. Since the torsional rigidity = transmission torque ÷ torsional angle, the greater the torsional angle, the smaller the torsional rigidity when the same magnitude of torque is transmitted. Through a large number of practical vehicle tests and volume production practices in the industry, the lower the torsional rigidity of the damping unit 20 is, the better the damping and noise reduction performance of the hybrid vehicle transmission system is.

It should be noted that the number of the damping springs 23 is at least two, and those skilled in the art can design the specific number of the damping springs 23 according to actual situations, and is not limited in more detail here.

As shown in fig. 4, in some specific embodiments, the torque limiter unit 10 further includes a separating ring 17, and the separating ring 17 is disposed between the elastic member 16 and the first friction member 13/the second friction member 15. The separating ring 17 can be better matched with a corresponding friction piece, so that the torque limiting effect of the torque limiting unit 10 is improved.

In a further embodiment, the hub 22 is formed with a hollow-out spring window 22a corresponding to the damper spring 23, and the damper spring 23 is accommodated in the spring window 22 a. The structure of the hub 22 is shown in fig. 6. As shown in fig. 5, a ring-shaped grease chamber 30 is defined between the driven plate 14 and the damping plate 21, at least two damping springs 23 are arranged in the grease chamber 30 along the circumferential direction, and the grease chamber 30 is filled with lubricating grease. It can be understood that, since the damper spring 23 is defined in the grease chamber 30 and the grease is filled in the grease chamber 30, the frictional noise between the damper spring 23 and the metal member during the compression process is reduced, and the noise reduction performance is further improved.

In other specific embodiments, the inner wall surfaces of driven plate 14 and damping plate 21 corresponding to the two ends of each damping spring 23 are provided with driving members 40 for driving damping springs 23 to compress. Specifically, as shown in fig. 3 and 7, the driving member 40 is a driving boss formed by simultaneously recessing the driven plate 14 and the damper plate 21 inward, and each driving boss corresponds to each end of each damper spring 23 one by one. In actual practice, when driven plate 14 and damping plate 21 rotate, the corresponding driving boss presses against the corresponding end of damping spring 23, thereby compressing damping spring 23, and damping spring 23 then drives hub 23 to rotate. For example, when driven plate 14 and damping plate 21 rotate clockwise in fig. 3, the drive boss on the left side in fig. 7 presses damping spring 23 to compress damping spring 23, and damping spring 23 in turn drives hub 23 to rotate clockwise. ,

in other specific embodiments, as shown in fig. 5, an annular sliding piece 50 is fixedly disposed in the grease chamber 30, a sliding groove adapted to the shape of the damper spring 23 is disposed on a surface of the sliding piece 50 for engaging the damper spring 23, and the damper spring 23 is slidably engaged with the sliding groove. Thus, the damping spring 23 is limited in the sliding groove of the sliding piece 50, the damping spring 23 is convenient to slide when compressed, friction noise between the damping spring 23 and a metal piece in the compression process is reduced, and the noise reduction performance is improved.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should be understood that the use of "system," "device," "unit," and/or "module" herein is merely one way to distinguish between different components, elements, components, parts, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element.

Wherein in the description of the embodiments of the present application, "/" indicates an inclusive meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

If used in this application, the flowcharts are intended to illustrate operations performed by the system according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A low torsional rigidity torsion-limiting flywheel damper assembly comprises a torsion-limiting unit and a damping unit;

the damping spring is characterized in that the damping spring is an arc spring.

2. The low torsional stiffness torque-limiting flywheel damper assembly of claim 1, wherein the hub defines hollow-out spring windows corresponding to the damping springs one-to-one, the damping springs being received in the spring windows;

3. The low torsional stiffness, torque limited flywheel damper assembly of claim 2 wherein the drive members are drive bosses formed by simultaneous inward recessing of the driven plate and the damper plate, each drive boss corresponding one-to-one with each end of each damper spring.

4. The low torsional stiffness torque-limiting flywheel damper assembly according to claim 2, wherein an annular sliding piece is fixedly arranged in the lubricating grease cavity, a sliding groove matched with the shape of the damping spring is arranged on one surface of the sliding piece, which is used for being matched with the damping spring, and the damping spring is in sliding fit with the sliding groove.

5. The low torsional stiffness torque limited flywheel damper assembly of claim 2 wherein the torque limiting unit further comprises a release ring that is press fit between the elastomeric member and the first/second friction members.

6. The low torsional stiffness, torque limited flywheel damper assembly of claim 1 or 5 wherein the resilient member is a belleville spring.